Xu, Yan-Li published the artcileHighly enantioselective one-pot sequential synthesis of valerolactones and pyrazolones bearing all-carbon quaternary stereocentres, Quality Control of 517-23-7, the publication is Organic & Biomolecular Chemistry (2021), 19(7), 1610-1615, database is CAplus and MEDLINE.
Highly enantiopure and bioactive δ-valerolactones I (R = Me, Ph, 1-naphthyl, 2-chlorophenyl, etc.; R1 = Ph, 1-naphthyl, 2-methylphenyl, etc.; n = 0, 1), and pyrazolones II, bearing α-all-carbon quaternary stereocentres, were successfully and sequentially prepared via a one-pot procedure starting from readily available, inexpensive materials, catalyzed by a new chiral squaramide III under mild reaction conditions. An organocatalytic Michael reaction afforded the valerolactones I, while a one-pot Michael-hydrazinolysis-imidization cascade yielded the pyrazolones II. This procedure is economically efficient and environmentally benign.
Organic & Biomolecular Chemistry published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C10H14O, Quality Control of 517-23-7.
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https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics